barnes



(No Model.) 2 Sheets--Sheet I.

G. P. BARNES. PAPER MAKING MAGHINE.

No. 507,648. Patented Oct. 31,1893.

WITNESSES: Q V R- Mm; "274d 2 2Sheets-8heet 2.5

G. P. BARNES. PAPER, MAKING MACHINE.

(No Model No. 507,643. Patented 001;. 31, 1893.

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UNITED STATES PATENT OFFIC GEORGE PLANTA BARNES, OF LONDON,-EN GLAND.

PAPER-MAKING MACHIN E SPECIFICATION forming part of Letters Patent No.507,643, dated October 31, 1893.

' Application filed June 28, 1892. $erial No. 438,297. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE PLANTA BARNES, of London, England, haveinvented certain new and useful Improvements in Pa per-Making Machines,of which the following is a specification.

This invention has reference to paper making machines in which the paperis formed upon an endless paper machine Wire or sieve. Heretofore suchmachines have consisted of a pulp box having one side open, with anendless traveling paper machine wire which in a part of its travel inwhich it moves upward is in close contact with the open side of the box,whereby pulp is directly deposited upon said wire from the box duringsaid upward movement, and a vacuum box in contact with the under side ofsaid wire.

According to my invention I employ in a paper making machine having apulp box having one side open, and an endless traveling paper machineWire which in a part of its travel in which itmoves upward is in closecontact with the open side of said box, a second and upper pulp boxhaving one side open and in close contact with said wire, and a rolleracross the bottom edge of the open side of said second box, whereby asecond thickness of paper becomes deposited upon the wet web of paperformed on the wire by the pulp from the first box, and said wet web isenabled to enter the second box without being disturbed on the wire.

In the accompanying drawingsz-Figure 1 is a side elevation of a papermaking machine constructed according to the preferred form of myinvention, the machine being one in which there are two endless wires,two pulp boxes being'arranged in connection with the one wire and onepulp box being arranged in connection with the other wire, and the twoWires being adapted to'superpose the two wet webs of paper which arerespectively formed thereon. Fig. 2 is a vertical section on a largerscale of the pulp box m, vacuum box 8 and part of the endless wire 1)shown in Fig. 1. Fig. 3 is a vertical section on a large scale of thesecond and upper pulp box m, vacuum box 6' and part of the endlesswire 1) shown in Fig. 1.

Referring to Figs. 1, 2 and 3, a a are side frames carrying bearings forthe shafts of the various rolls and rollers hereinafter described; b isthe endless wire; it passes from the roller 0 at the bottom up to andover the roller 61, then over the guide roller e and between the upperand lower couching rolls f g, which are of ordinary construction; fromthe lower roller 9 the wire goes around the usual guide rollers and backto the roller 0. The wire preferably receives its motion from the lowercouching roll, this roll 9 being The depth of the pulp in the box m and.

consequently its pressure upon 'the wire I) is regulated by means of oneor more of the usual overflow pipes n, see Fig. 2, the height of whichcan be adjusted;- the adjustment is preferably effected as heretofore byforming the pipes at with an ext-ernalscrew thread to work in a femalescrewp in the bottom of the box m. t

In order to keep the pulp in the box no at uniform consistency the usualrevolving agitator r is fitted in'the box.

8 is a vacuumbox of ordinary construction in contact with the under sideof the wire, immediately opposite the pulp box m.

The wire I) is shown as traveling at an angle of about thirty degreesfrom the vertical between the rollers c and d. This angle is that whichI consider the most suitable, but

it can be very considerably varied. An important point in such machinesis that the wire b should be in close contact with and in factconstitute one side of the pulp box so that the paper may be at onceformed from the box on the Wire; thus the tendency of the fibers to getlaid orplaced parallel with the line of travel is avoided.

As thus far described the machine is of known construction and itsoperation is the usual one of depositing a layer of pulp on the wire bas. it passes upwardly in contact with the pulp box m. This pulp isdrawn or IOC sucked onto the wire by the combined efiect of gravitationand of the vacuum in the suc tion-box 8. Part of the water in the pulppasses through the wire into the vacuum box, and paper is at once formedon the wire. This paper travels as a continuous web, and is then usuallycarried upwardly by the wire I) to the couching rollsfg,where it iscouched in the usual manner. After passing the couching rolls the paperand wire separate, the wire going over guiding rollers to the roller 0and the web passing onto the ordinary appliances for effecting thepressing, drying or other subsequent operations usual, and which form nopart of my invention.

According to my invention I provide a second pulp box above the firstfor applying a second layer of pulp on that first deposited, and Iprovide improved means for facilitating the passage of the first webinto contact with this second box. This is preferably accomplished asshown in the drawings, in which m is a second pulp box placed above thefirst pulp box m so as to lay a second thickness of paper upon the Wetweb of paper formed by the pulp from the first box 'm. The upper box mcan contain the same grade of pulp as or a difierent grade of pulp fromthat in the box on. An upper vacuum box 5 is placed opposite the upperpulp box m.

o is a roller placed across the bottom edge of the open side of theupper box m and free to turn in bearings in the end of said box. The wetweb of paper in its upward travel with the wire 1) passes under, andpresses against the roller 1;, and as this roller is thereby caused toturn on its axis the said wet web is not disturbed as would be the caseif the bottom edge of the open side of the box were fixed.

'm is a strip of leather or other like suitable material to prevent thepulp escaping from the box behind the roller 2;. The said strip is fixedalong one edge of the bottom of the box m, while its other edge overlapsthe roller 1; as shown. By the use of this upper box the paper formed onthe wire I) at the lower box can be thickened, orit can be coated withan enamel or other surface, or in the case where another web of paper isto be superposed as about to be described the said upper box m cansupply a pulp of stronger or different fiber to constitute the middlelayer of a triplex paper.

\Vith the machine as described the wire with the duplex or coated wetweb of paper passes over the upper roller d and guide roller 6 to thecone-hing rollsfg, but when it is required to make a triplex paper asecond web of paper is formed by means of the endless Wire b pulp box mand vacuum box 3 the wire 12 passes from the roller 0 up to the roller(Z and then overthe guide rollers e 7L2,

press roller h and guide roller 2' back to the roller 0 its tensionbeing regulated by raising or lowering the brackets 21/ carrying theroller t by means of screw shafts F. The two wires with their respectivewet webs of paper meet on passing the roller 61 and travel togetherbetween the roller h and the vacuum box 8 receiving suitable pressurefrom the roller 71 which is an ordinary weight roller; the upper wirethen rises to the roller 71 while the lower wire with the twosuperimposed webs passes on to the couching rolls f g.

to is a pipe for supplyinga stream of water to wash the upper wire 19before it again reaches the pulp box m this water falls through the wireinto a receiver m with outlet pipe 00 and the same receiver collects thewater which falls through the wire b after it passes the vacuum box 5this water being directed by the guides 1 z is a doctor or scraper toclean the roller 0 It will be seen that my invention provides animprovement in paper making apparatus which can be readily availed of,and which will facilitate the making of paper composed of superposedwebs, and it will be understood that the invention is not limited in itsapplication to a machine having the particular details of constructionand arrangement described and shown, as it may be employed as thecircumstances may dictate without departing from the essential featuresof the inven tion.

What I claim is-- In a paper making machine, the combination with a pulpbox having one side open,

and an endless traveling paper machine wire which in a part of itstravel in which it moves upward is in close contact with the open sideof said box, whereby a wet web of pulp is deposited on said wire as itpasses said box, of a second and upper pulp box having one side open andin close contact with the side of said wire on which said wet web ofpulp is deposited, and a roller across the bottom edge of the j openside of said second box, constructed to bear against the side of saidwire on which said wet web of pulp is deposited and revolve as said wireenters said second box, whereby said wet web is enabled to enter thesecond box without being disturbed on the wire, and a second thicknessof paper may become deposited in said second box upon the wet web ofpaper formed on the wire by the pulp from the first box, substantiallyas set forth and shown.

In witness whereof I have hereunto signed. my name in the presence oftwo subscribing witnesses.

GEORGE PLANTA BARNES.

\Vituesses:

JOHN G. N EWBURN, GEORGE C. BACON.

